Toolholder tightening fixture



FIG. 1 is a front view of a toolholder tightening fixture showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top front perspective view thereof; and,

FIG. 8 is a top rear perspective view thereof.

The broken line showing of environmental structure is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a toolholder tightening fixture, as shown and described. 